VtheGNMan
Well-Known Member
- Joined
- May 19, 2014
- Messages
- 876
I am getting close to reinstalling the engine after a light rebuild and had some questions for the break in procedure.
Here is what I have done so everyone knows as what's in my signature will change quite a bit. Pistons have new rings, new crank and piston bearings, new flat tappet cam, new lifters, new valve springs and pushrods. Obviously all new gaskets too. I will only be running distilled water and RMI. Converting to E85 too so new chip, 80# injectors, fuel pump and supply and return fuel lines. Will be running ZDDP too.
Question is on the procedure and timing of things for break in. Let me know if I have this right.
1) Upon initial start up of engine. Run it for 30 mins, varying rpms between 1500-2000. Watching for leaks and making sure oil pressure is fine. Shut down after 30 mins. Let cool.
Being it has now been heat cycled, re-torque heads.
2) Take for drive. 50-100 miles or so? Obviously if anything is not right cut short.
3) Change oil? Now or later in the process? Re-torque heads again?
4) Drive again to seat rings. When and how high of boost do I push it to seat the rings? And I understand to start with a little boost and add a little more and a little more till you get to the target lbs. Like a roll of the throttle on up to 2 #s. Then another roll on up to 5#s. etc.
5) After seated rings drive, drive sedated for 500 miles to fully break in cam and lifters?
Any corrections or tips to this process as I understand it? Thanks guys for any insight you can give!
Here is what I have done so everyone knows as what's in my signature will change quite a bit. Pistons have new rings, new crank and piston bearings, new flat tappet cam, new lifters, new valve springs and pushrods. Obviously all new gaskets too. I will only be running distilled water and RMI. Converting to E85 too so new chip, 80# injectors, fuel pump and supply and return fuel lines. Will be running ZDDP too.
Question is on the procedure and timing of things for break in. Let me know if I have this right.
1) Upon initial start up of engine. Run it for 30 mins, varying rpms between 1500-2000. Watching for leaks and making sure oil pressure is fine. Shut down after 30 mins. Let cool.
Being it has now been heat cycled, re-torque heads.
2) Take for drive. 50-100 miles or so? Obviously if anything is not right cut short.
3) Change oil? Now or later in the process? Re-torque heads again?
4) Drive again to seat rings. When and how high of boost do I push it to seat the rings? And I understand to start with a little boost and add a little more and a little more till you get to the target lbs. Like a roll of the throttle on up to 2 #s. Then another roll on up to 5#s. etc.
5) After seated rings drive, drive sedated for 500 miles to fully break in cam and lifters?
Any corrections or tips to this process as I understand it? Thanks guys for any insight you can give!